Improvement in manufacture of axe-bits



N. PETERS. PHOTO LTHOGRAPHER. WASHINGTON D C CHARLES BLAIR, or COLLINsvlLLE, coNNncT'rcUT, .essie-NOR To THE COLLINS COMPANY, OF SAMEPLACE.,

- Letters 'Patent N 93,656, dated A'ugttst 17, 1869.

IMERQVEMENTIN MANUFACTURE or lAXE-BITS.

The Schedule referred to in these Letters Patent and making part of the saire.

To all whom -it may concern:

Be it known that I, CHARLES BLAIR, vof collinsville, in the county of Hartford, and State of Gonnecticut, have invented a new and useful Improve- -lnent in Blanks for Axe-Bits; and I'do hereby declare that the following is a full, clear,4 and exact description thereof, which will enable others skilled in the art` to make and use the same, reference being had to the. accompanying drawing, forming vpart of this specification.

This invention relates to improvements in blanks lfor 'the steel bits for axes andvother edge-tools, designed to provide blanks of a form bettercalculated to fit and weld to the polls of axes and other tools which are narrower at the edge than Vat or toward the eye, previous to the wedging on of the blanks.

The invention consists in the manner of improving certain blanks described in the patent granted to Harvey Mann, June 3, 1862, No. 35,480, as hereinafter described. v

l Figures l to 4 represent the blanks formed according to the said Manns patent, andtheir application to the polls, of axes previous to'andiu the finished formv or'shape after welding. p Figures 5 to 8 represent the blanks formed according to my improvement, and their application to the poils of axes, previous to and in thenished form. Figure 9 represents afront elevation of a set of -rollers properly adjusted and' located to do the work economically, each' or both provided with grooves such as I employ forforming the blanks according to my improvement. f

Similar letters of reference indicate corresponding parts. I v

The blanks A, as made .by Mann, are formed by rolling steel bars into the form shown in cross-section in fig. l, and then cutting the bars into the proper lengths, by any preferred means. v 'lhey are th'en bent into theform' represented in iig. 2, preparatory to being applied tothe polls for welding andfinisliing, :1s-represented in iig. 3.

They are. necessarily, for economy, cut from the bars at right angles thereto,making'them, when bent into the form representedin fig. 2, as long between the points a a as between the points lfb.

When blanks of this formare applied to axe-polls B, whiclnare narrowest at the bit, either the lips (l of "the steel will fail to cover some parts of the sides of the polls, as at C, or .the steel bits will project too much beyond the edges of the polls l. t D, if the blanks are made long enough to cover the polls at G; andif the bits be so extended, the axe will not finish into proper shape under the operation of hammering down to an edge, which spreads the bit at the same time that t is elongated, thereby causing the steel blanks, when so applied, to spread too much, and they require to be trimmed off, and this causes a large percentage of imperfect welds. I,

To provide for this spreading of the bits, and to insure the perfect welding of the blanks to the polls, the polls are necessarily made nanowestat 'the edge, as shown in fig. 3.

Eiiorts have'been made to elongate the lips of the "steel bits between the points b 7)by hammering, to

ive to the ends thereof the requisite curvature to it t e polls,.but without satisfactory results, as it is practically difficult to draw them evenly iu this manner. v

My invention consists in elon gating the lips of 'these blanks, as lrepresented at F, igs. 5 and 6, in the following manner:

I provide grooves E, in rollers adapted to the purpose, substantially as set forth iufig. 9, and so formed that the blanks A, between theipoiutsmarked a: or

thereabout, will it 4snugly therein in passing through, y but not so as to be alt-ered in shape, while the parts from x to y, ou each side, will beA sutliciently squeezed to velongate them as shown in fig. 5, which mayv be done, more or less, as required, for polls having various curvatures near the bits.

These blanks, when bent inthe form represented in fig. 6, and applied to the polls (fig. 7) for welding and drawing, will cover the sides of the polls to the edges properly, and spread uniformly with the said polls.

Having thus described my invention, That I claim as new, and desire to secure by Letters Patent, is-

The method herein described-of elongating-the 'lips of axe-bit blanks, for the purpose speciiied. I

' UHAS. BLAIR.

Witnesses:

' OLIVER F. PERRY, p EDWARD H. SEARS. 

